Welcome to BRG Emergency MAss Notification - The Leader in Wireless Emergency Mass Notification Syst, BRG manufactures large LED Digital Clocks, Time Zone Clocks, master clocks, Digital Clocks, Wireless Clocks, 24 Hour Clocks, Time Zone Wall Clocks, Wireless Hospital Clocks, Wireless School Clocks, Military Clocks, World Time Clocks, Electronic Clocks, LED Displays, Digital Wall Clocks, Timers, Countdown Timers, Large Timers, Counters, moving message displays, digital marquee, electronic message sign, moving message signs, network clocks, Countdown Timers, Ethernet Clocks, Atomic Clocks, GPS, Di.